1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kow [346]
3 years ago
13

A model train engine was moving at a constant speed on a straight horizontal track. As the engine moved​ along, a marble was fir

ed into the air by a spring in the​ engine's smokestack. The​ marble, which continued to move with the same forward speed as the​ engine, rejoined the engine 1 sec after it was fired. The measure of the angle the​ marble's path made with the horizontal was 61degrees. Use the information to find how high the marble went and how fast the engine was moving.
Physics
1 answer:
bagirrra123 [75]3 years ago
3 0

Answer:

The marble was moving in a projectile and the speed of the engine was 2.716 m/s

Explanation:

The vertical component of the marble's flight path relative to the train

is given by the equation y(t) = v*t - (4.9)*t^2,

where, v is the initial upward velocity of the marble relative to the train.  

So with y(1) = v - 4.9 = 0 we have  

v = 4.9 m/s.

The marble will reach maximum height after 0.5 seconds, at which the

height will be y(0.5) = (4.9)*(0.5) - (4.9)*(0.5)^2 = (4.9)*(0.25) = 1.225 m.

Now,  the marble has a vertical velocity component of 4.9 m/s and a horizontal velocity component

of V m/s such that tan(61) = 4.9 / V

V = 4.9 / tan(61) = 2.716 m/s

This horizontal velocity component of the marble is the same as the

speed of the train i.e. 2.716 m/s.

You might be interested in
Mars had a mass of 6.38* 10^23 kg and a radius of 3,390,000meter what is the force of gravity experienced by a mars rover with a
d1i1m1o1n [39]

I hope its helps you . you can also write 1.44×10^3 it will be better

7 0
2 years ago
Briefly describe the formation of the planets from the solar nebula
saul85 [17]
<span>The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a proto-planetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.


Hope it helped
</span>
6 0
3 years ago
How and where is old oceanic crust destroyed?
sladkih [1.3K]

Answer:

It is destroyed in subduction zones. A Geologic process in which a tectonic plate made of dense lithospheric material melts or falls below a plate made of less-dense lithosphere at a convergent plate boundary

Explanation:

Hope this helps (:

8 0
3 years ago
Read 2 more answers
What do you think happens to the temperature when water changes to gas?
Olenka [21]

Answer:

it gets hot and more hot until it turns to gas

Explanation:

5 0
3 years ago
A train on a straight track goes in the positive direction for 5.9 km, and then backs up for 3.8 km
kenny6666 [7]

Answer:

2.1km

Explanation:

Ill take it as u are talking about the displacement

Since displacement has negatives and positves

5.9 - 3.8 = 2.1km

6 0
3 years ago
Other questions:
  • The sun heats earth's atmosphere unevenly. this causes convection currents to move in large circles in the atmosphere. what is t
    7·2 answers
  • What is the relative humidity when the dry-bulb temperature is 16°c and the wet-bulb temperature is 14°c?
    13·1 answer
  • A ball is thrown with an initial speed of 10. Meters per second. At what angle above the horizontal should the ball be thrown to
    13·2 answers
  • Suppose you want a telescope that would allow you to see distinguishing features as small as 3.5 km on the Moon some 384,000 km
    11·1 answer
  • What types of alternative fuels did bp pursue after browne became ceo in 1995?
    14·1 answer
  • It requires 350 joules to raise a certain amount of a substance from 10.0°C to 30.0°
    9·2 answers
  • A cabinet weighing 100 N is placed on a floor. The amount of contact area between the cabinet and the floor is 0.5 m2. How much
    5·1 answer
  • The index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660 . A beam of white light in
    11·1 answer
  • Which describes the current model of the atom ?
    13·1 answer
  • A race car travels in a circular track of radius 200m. If the car move with a constant speed of 80 m/s, find (a) its angular vel
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!